016 7. The following data give the speeds (mi/hr), as measured by radar of 16 cars...
Current Attempt in Progress The following data give the speeds of 13 cars, measured by radar, traveling on 1-84. 73 75 76 72 70 79 68 65 78 70 74 76 71 Find the values of the three quartiles and the interquartile range. Qı = i Q2 = i 03 = 1 IQR = i Hint
The recorded speeds (in mi/hr) is observed from a sample of 40 cars traveling on the 101 freeway near La Conchita. The sample has a mean of 68.4 mi/hr and a standard deviation of 5.7 mi/hr (based on data from Sigalert). a. Find a 98% confidence interval estimate for the mean speed of all cars. [5 pts] b. Provide an interpretation of your interval in the context of the data. [2pts]
5. The recorded speeds (in mi/hr) is observed from a sample of 40 cars traveling on the 101 freeway near La Conchita. The sample has a mean of 68.4 mi/hr and a standard deviation of 5.7 mi/hr (based on data from Sigalert). a. Find a 98% confidence interval estimate for the mean speed of all cars. (5 pts) b. Provide an interpretation of your interval in the context of the data. [2pts) 6
Do drivers follow the posted speed limit of 65 mph on Interstate 270? The following data give the speeds (mph), as measured by radar, of 10 randomly selected cars traveling on Interstate 270: 76 72 80 68 76 74 71 78 82 64 Assume all conditions are met for confidence intervals. Find a 99% confidence interval for the population mean speed of all drivers on I-270. [3] Find a 95% confidence interval for the population mean speed of...
Listed below are totally made-up speeds of cars on 1-210 East in mph. Assume that the speeds of drivers are normally distributed. 74 81 62 64 71 87 74 66 82 76 74 65 76 61 79 Construct a 95% confidence interval for the average speed of a driver on the 210 E. Compute the Margin of Error, E, rounded to 2 decimal places.
Listed below are speeds (in mi/h) of cars on the New Jersey Turnpike by race of the driver. All cars are going in the same direction, and all of the cars are from New Jersey. The data are from Statlib and the authors are Joseph Kadane and John Lamberth. Find Variance and find the standard deviation. 79 70 71 76 76 74 71 75 74 74 Var=745-2.749 O 5-2.749. Var 7.55 O mean - 745 2.749 mean -7.45 2.749
5. The recorded speeds (in mi/hr) is observed from a sample of 40 cars traveling on the 101 freeway near La Conchita. The sample has a mean of 68.4 mi/hr and a standard deviation of 5.7 mi/hr (based on data from Sigalert). You must do all of your calculations on the TI calculator. DO NOT Use the Stats -> Tests for any of the problems. a. Find a 98% confidence interval estimate for the mean speed of all cars. [5...
Listed below are speeds (in mi/h) of cars on the New Jersey Turnpike by race of the driver. All cars are going in the same direction, and all of the cars are from New Jersey. The data are from Statlib and the authors are Joseph Kadane and John Lam berth. Find Variance . and find the standard deviation. 79 70 71 76 76 74 71 75 74 74 Group of answer choices a) s=2.749, Var =...
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:30 P.M. on a weekday. Use the sample data to construct 95% confidence interval estimate of the population standard deviation. 60 61 61 57 61 53 59 58 59 68 62 66 The confidence interval estimate is ______ mi/h
Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:30 P.M. on a weekday. Use the sample data to construct a 98% confidence interval estimate of the population standard deviation. 60 65 65 55 65 55 59 58 59 69 62 66. The confidence interval estimate is ____ mi/hless thansigmaless than _____ mi/h. (Round to one decimal place as needed.)